Yes indeed, a carrousel mechanism rotates the escapement within a rotating cage. Here's what I wrote about the Carrousel in my report from 2009:

On Jeff's wrist was Blancpain's new and magnificent Carrousel, the world's first one-minute carrousel of any kind. Actually it showcases several additional worlds firsts' including being the first flying carrousel and the first carrousel with a balance wheel centered within the rotating cage. For those unfamiliar, a carrousel performs the same function as a tourbillon, that is, to reduce the effects of gravity on the escapement.

The manner in which a tourbillon and a carrousel rotate the cage is a bit different, but describing this difference is beyond the scope of this report. For simplicity's sake, a tourbillon cage's rotation is driven directly by the intermediate wheel, whereas in a carrousel, the rotating cage is driven through an additional differential gear train from the intermediate wheel.

The carrousel device was invented in the late 1800s by Bahne Bonniksen, and like a tourbillon, rotates the escapement within a rotating cage to average out gravity's effects. For ease of design and construction sake, Bonniksen carrousels featured rather slow rotation cycles (e.g., completes a 360-degree rotation) of between 34 minutes and 52.5 minutes. Nevertheless, pocket and deck watches fitted with Bonniksen carrousels were exceptional rate-keepers and were the best and most consistent performers when submitted to observatory trials and competitions in the early 1900s. Using modern design tools and techniques, Blancpain redesigned Bonniksen's carrousel to allow for a 60-second rotation cycle, with a traditionally low balance wheel speed (3 Hz, or 21,600 bph).